<template>
  <div id="root">
		<div class="todo-container">
			<div class="todo-wrap">
        <Header-com :addTodo="addTodo"></Header-com>
        <List-com 
					:todo="todos" 
					:checkedTodo="checkedTodo"
					:delTodo="delTodo"
					></List-com>
        <Footer-com
					:todo="todos"
					:checkAllTodo="checkAllTodo"
					:clearAllTodo="clearAllTodo"></Footer-com>
			</div>
		</div>
	</div>
</template>

<script>
// 引入School组件
import MyHeader from './components/MyHeader'
import MyList from './components/MyList'
import MyFooter from './components/MyFooter'


export default {
  name: 'App',
  components: { 
    'Header-com': MyHeader,
    'List-com': MyList,
    'Footer-com': MyFooter
  },
	data() {
		return {
			todos: JSON.parse(localStorage.getItem('todos')) || [
				{id: '001', title: '抽烟', done: false},
				{id: '002', title: '喝酒', done: false},
				{id: '003', title: '开车', done: false},
			]
		}
	},
	methods: {
		// 添加
		addTodo(obj) {
			this.todos.unshift(obj);
		},
		// 勾选
		checkedTodo(id){
			this.todos.forEach( item => {
				if(item.id === id)
				item.done = !item.done
			})
		},
		// 删除
		delTodo(id) {
			this.todos = this.todos.filter(item => item.id !== id)
		},
		// 全选
		checkAllTodo(done) {
			this.todos.forEach( item => item.done = done )
		},
		// 清除已完成
		clearAllTodo() {
			this.todos = this.todos.filter( item => !item.done )
		}
	},
	watch: {
		todos:{
			immediate: true,
			deep: true,
			handler(newVal) {
				localStorage.setItem('todos', JSON.stringify(newVal))
			}
		}
	}
}
</script>

<style>
/*base*/
	body {
		background: #fff;
	}
	.btn {
		display: inline-block;
		padding: 4px 12px;
		margin-bottom: 0;
		font-size: 14px;
		line-height: 20px;
		text-align: center;
		vertical-align: middle;
		cursor: pointer;
		box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
		border-radius: 4px;
	}
	.btn-danger {
		color: #fff;
		background-color: #da4f49;
		border: 1px solid #bd362f;
	}
	.btn-danger:hover {
		color: #fff;
		background-color: #bd362f;
	}
	.btn:focus {
		outline: none;
	}
	.todo-container {
		width: 600px;
		margin: 0 auto;
	}
	.todo-container .todo-wrap {
		padding: 10px;
		border: 1px solid #ddd;
		border-radius: 5px;
	}
</style>